TY - JOUR
T1 - Finite Element Analysis of the Implantation of a Self-Expanding Stent
T2 - Impact of Lesion Calcification
AU - Zhao, Shijia
AU - Gu, Linxia
AU - Froemming, Stacey R.
N1 - Copyright:
Copyright 2012 Elsevier B.V., All rights reserved.
PY - 2012/4/5
Y1 - 2012/4/5
N2 - In this work, the deployment of a self-expanding stent in a stenosed artery was evaluated through finite element analysis. The three-layered structure of the artery and their material properties were measured and implemented in our computational models. The instant outcomes, including lumen gain, tissue prolapse, and stress distribution, were quantified, and the effect of plaque calcification was evaluated. Results showed that the peak wall stress occurred on the media layer regardless of plaque calcification. The calcified plaque mitigated the tissue prolapse and arterial wall stresses in general, compared with the soft plaque. However, the lesion calcification led to a more severe residual stenosis, dogboning effect, and corresponding edge stress concentrations after stenting, which requires pre- and/or post-surgical management.
AB - In this work, the deployment of a self-expanding stent in a stenosed artery was evaluated through finite element analysis. The three-layered structure of the artery and their material properties were measured and implemented in our computational models. The instant outcomes, including lumen gain, tissue prolapse, and stress distribution, were quantified, and the effect of plaque calcification was evaluated. Results showed that the peak wall stress occurred on the media layer regardless of plaque calcification. The calcified plaque mitigated the tissue prolapse and arterial wall stresses in general, compared with the soft plaque. However, the lesion calcification led to a more severe residual stenosis, dogboning effect, and corresponding edge stress concentrations after stenting, which requires pre- and/or post-surgical management.
KW - Calcified plaque
KW - Finite element method
KW - Layered artery
KW - Nitinol
KW - Self-expanding stent
KW - Stent-artery interaction
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U2 - 10.1115/1.4006357
DO - 10.1115/1.4006357
M3 - Article
AN - SCOPUS:84859587843
VL - 6
JO - Journal of Medical Devices, Transactions of the ASME
JF - Journal of Medical Devices, Transactions of the ASME
SN - 1932-6181
IS - 2
M1 - 021001
ER -